Pantograph-trolley



w. SCHAAKE.

PANTOGRAPH TROLLEY.

APPLICATION FILED NOV..29. 1915.

1 ,354, 34, Patented Sept. 28, 1920;

2 SHEETYSSHEET x.

WITNESSES INVENTOR W/Hmm-Schaake. I o I BY I ATTORNEY W. SCHAAKE.

PANTOGRAPH TROLLEY.

APPLICATION FILED NOV.29. 1915.

mm a 8 m i NEE INVENTOR William S-chaake.

ATTORNEY WITNESSES UNITED STATES PATENT OFFICE.

WILLIAM SCHAAKE, 0F PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSE ELECTRIC AND MANUFACTURING CQlVi'PANY, A G-iERPQRAT UN G1 PENNSYLVANIA.

' V I rAN'rosRArn-raoLLnY.

1 354 134 I Specification of Letters Patent. Patented Sept 28, 1920.

Application filed November 29, 1915;

To all 20. 1 0722 it may concern: 7

it known that 1, WILLIAM SCHAAKE, a

the United. States, and a resident ittsburgh, in the county of Allegheny (tote of Pennsylvania, have invented a and useful improvement in Pantoci icon of graph-Trolleys, of which the following isa ation.

invention relates to trolleys and pary to itograph trolleys which are by fluid-press re mechanisms and are 4. by the action of gravity.

coject oi in inventionis to provide a pant-ograph trolley which shall 'be mounton shafts and counterbalanced thereon by re nt members so that thefluid-pressure anisms, inraising the trolley, will need only to supply the contact pressure, pressure to compensate for friction oi the moving parts and pressure to overcome the unbalanced weight of the trolley.

Another object of my invention is to provide a pantograph trolley which shall be raised by a fluid-pressure mechanism that is resiliently and flexibly connected to the pantogr ph name. i

lilore specifically, the object of'my invention is to provide a pantograph trolley which is mounted upon shafts having cams mounted thereon, certain of which are re siliently and flexibly connected to fluidpressure mechanisms for raising the trolley and others of which are connected to resilient members that counterbalance aportion of the weight of the trolley on the shafts.

In the accompanying drawings illustrating my invention, Figure 1 plan view, and Fig. 2 is an elevation of a pantograph trolley constructed in accordance with my invention. Figs. 3 and i are modifications of the fluid-pressure mechanism. i

The pantograph trolley illustrated in the drawings comprises a current collector .2, a frame 3 that is supported upon shafts & and 5 and is adapted to turn therewith and upon which the current collector 2 is mounted, and fluid-pressure mechanisms 6 and 7 which are respectively connected to the shafts i and 5 for raising the trolley. The weight of the frame 3 is counterbalanced by a plurality of resilient members 8 and 9 spectively connected to the shafts 4L and The resilient members 8 and 9 are preferably coil springs under tension, but such a structure is not essential to my invention. The

is a diagrammatic which are 16-- erial No. 64,043.

tograph frame 3 has an upper portion com arising rods 10, l1, l2 and 13 having M1611 upper ends joined to the current coilector 2 and having their lower ends joined to hinge connectors 14, l5, l6 and 17,- and a lower portion comprising rods 18, 19 and 29 having their upper ends joined to the connectors 14 and 15 and their lower s rigidly connected to the shaft to turn erewith, and rods 21, 22 and 23 having .n upper ends joined to the hinge connectors l6 and 17 and their lower ends rigidly connected to the shaft 4 to turn there with.

llie shafts 4i and 5 are mounted upon angle bars 24:, 255, 26 and 27' which are mounted upon the insulated supports 28. The shaft has cams 29 and 30 rigidly mounted thereon to turn therewith and r spectively connected to the resilient member 8 and the fluid-pressure mechanism 6. The shaft 5 has cams 31 and-32 mounted thereon to turn with it and respectively connected to the resili member 9 and to the fluid- .ssure mechanism 7. Tie rods 33 and 34, causing the shaftsland 5 to ti n toher, ioined to the upper and des thereor by levers which ar rigidly oted upon the shafts.

esilient member 8, which is proton inc; under tension, has one end led to the cam 29 and its other end joined a1 36 which is mounted on the angle .r 26. The resilient member 9, which is also preferably a coil spring under tension, has one end joined to the cam 31 and its other end joined to 'anarm 37 which is mounted on the angle bar 24. The resilient members 8 and 9 are made of such strength that they counterbalance a portion only or the weight of the frame on the shafts 4 and 5 so that the fluid-pressure mechanisms 6 and 7 need only overcome the friction of the moving members, contact pressure and the alanced weight of the frame.

the fluid-pressure mechanism 7 and are designated 'by like reference characters. I

The fluid-pressure mechanism disclosed in Fig; 8 comprises a fluid-pressure cylinder 44 having an inlet portseto, a piston head 46 operating ,withinthe fluid pressure cylinder 4L4, a piston rod l-T'having one end pivotally connected to the piston head 4L6-and its other end pivotally connected to a rod 48' which has one end connectedto a resilient member a9 and its other endnpivotally' joined to asuppcrt 50. The fluid-pressure V mechanism showninFig; 4: comprises a fluid pantograph frame, a contact shoemountedpantograph trolley 1,

mounted thereon,

mechanism for raising sa d frame, and flexi- 'ble. and resilient means for connecting sa d cylinder 51 havinganinlet porti52, a 'pistoni head 53, a'pistoirrod 54having one end pivotally joined .to the pistonliead 5 land its other end pivotally connected to a rod 55.

which has its other endpivotally connected toaisupport'56, and a resilient member 57 which is joinedto theirod intermediate its lends. r r

The mechanisms which have been designated as fluid-pressure mechanisms are operated by Vacuum which is imparted to the cylinders 38 through the ports 39. T he which is shown" in a raisedlpositiommay be lowered by releasing the vacuum imparted to cylinders 38 of the,

fluid-pressure mechanisms 6 and 7, whereby thew/eight of the trolley 1, acting against the tension ofthe resilient members 8 and 9,

will lower the trolley. In order -to raise the trolley, thepressure within thecylinders 38 of the fluid-pressure mechanisms 6 and 7 is reduced, whereby the'piston heads 40, op-

erating throu h the'piston rods tl, resilient members 42, fle:tible members 43 and the cams 32 and 30, will turn the shafts a. and 5 to raise the trolley. 1

()bviously, the apparatus-of my invention" may be-varied considerably without departingfromthe spirit an'dscope of my'invention, and desire,'therefore,.that only such limitations shall be imposed as are indicated in the appended claims.-

I claim as my invention; 1. In a trolley, the combination with a upon said frame, and shafts for supporting cams, mounted upon said said frame, of

shafts, and vacuum-actuated mechanisms comprising cylinders, vacuum-actuated pistons operating within sa d cylinders 1 and fiexibleconnections between said cams and said pistons. z

and; a contact shoe pantograph frame, 7

of' a Vacuum-actuated mechanism to said frame.

pantograph frame, upon said frame, shafts forsupporting said 2.1n a trolley, the combination with a ;3. trolley, the combination with a pantograph frame, shafts for supporting said frame and forraising the same when rotated, .andcams mounted upon, and rotating with said shafts, of a fluid-pressure mechanism for rotating saidshafts to raise said frame com rising fii'iid-pressure cylinders, pistons operating within said cylinders and resilient and flexible members for connecting said pistons to said cams.

Li1n:a.trolley,.the combination with a pantographnframe, shafts V for supporting said 1 frame and for raising the same, when rotated, andcains mounted'upon, and rotating. with, saidisshafts, of fluid-pressure mechanism for rotating said shafts to -raise said frame and comprising fluid-pressure cylinders, pistons-operating within said cylinders, piston .rods :pivotally connected to said pistons, and resilient and flexible members for connecting said piston rods to said cams,

-5. In a. trolley, the combination with a pantograph. frame, of a' fluid-pressure mechanismfor raising. said frame, resilient and flexible-members. for joining said mechansm to saidJfra-me, and resilient means initiallytending to raise said frame to counterbalance only a. portion of saidfraine.

6. In a trolley, the combination with a contactslioe anda pantograph frame, of a Vacuum mechanism for raisingsaid frame and saidshoe, and resilient means for counterbalancing, only a portion of the weight of shoe and said frame. 7

tin a trolley, the combination with a pantograph frame-,a contact shoe mounted uponsaid frame, andshafts for supporting, said frame and for raising the same when rotated,of cams mounted upon said shafts, resilient members-under tension connected to certain of; said" cams, andlvacuum-actuatedm'echaiiisms connected to the remaining cams I v 8; Ina trolley, the combination with a a contact shoe mounted.

WILLIAM SCHAAKE. 

